An Improved Reversible Data Hiding Technique Based on Histogram Bin Shifting

In this paper, we propose a novel reversible data hiding scheme, which can exactly recover the original cover image after the extraction of the watermark. The proposed scheme is based on the histogram bin shifting technique. This scheme utilizes peak point (maximum point) but unlike the reported algorithms based on histogram bin shifting, we utilize second peak point instead of zero point (minimum point) to minimize the distortion created by the shifting of pixels. Proposed scheme has low computational complexity. The scheme has been successfully applied on various standard test images and experimental results along with comparison with an existing scheme show the effectiveness of the proposed scheme. Higher Peak Signal to Noise Ratio (PSNR) values indicate that proposed scheme gives better results than existing reversible watermarking schemes.